Permaculture: Mark, tell our readers who you are, what have you done before and how did you hear about the extraordinary story of Yacouba Sawadogo?
I am an independent filmmaker based in England. For over 20 years I worked as a staff cameraman for the BBC working on documentaries in the UK and abroad.
In 2007 I visited a friend, Ashley Norton, who was living in the north of Burkina Faso. He suggested that we visit 'an interesting farmer' who lived in a village nearby.